Air conditioner

ABSTRACT

The air conditioner may include a sensing unit for sensing a breakdown or an operation state of a motor. The state of the motor is sensed using a non-contact type sensor, whereby it is possible to easily monitor states of a compressor and a fan motor, to sense progress of the abnormality of the compressor and the fan motor or whether the compressor and the fan motor have broken down, and to estimate the expected lifespan of the compressor or the fan motor based on the state thereof using the monitored results. Damage to the air conditioner may be prevented due to abnormality of the compressor or the fan motor.

CROSS-REFERENCE TO RELATED APPLICATION

This application claims priority from Korean Patent Application No. 10-2015-0019743, filed Feb. 9, 2015, the subject matter of which is incorporated herein by reference.

BACKGROUND

1. Field

Embodiments may relate to an air conditioner, and more particularly to an air conditioner that is capable of determining an operation state or abnormality of a compressor or a fan in the air conditioner.

2. Background

An air conditioner may discharge cool air or hot air into a room to adjust indoor temperature and to purify indoor air, thereby providing a more comfortable indoor environment. The air conditioner may include an indoor unit that is installed in the room, and an outdoor unit for supplying a refrigerant to the indoor unit. The indoor unit may include an indoor heat exchanger. The outdoor unit may include a compressor and an outdoor heat exchanger.

The air conditioner may be controlled in a state in which the air conditioner is divided into the indoor unit, which includes the indoor heat exchanger, and the outdoor unit, which includes the compressor and the outdoor heat exchanger. More specifically, the compressor or the heat exchanger may be controlled to be powered on or off to operate the air conditioner. The air conditioner may be configured such that at least one indoor unit is connected to the outdoor unit. Depending on a required operation state of the air conditioner, the refrigerant may be supplied to the indoor unit such that the air conditioner operates in a cooling mode or a heating mode.

The air conditioner may perform a cooling operation or a heating operation based on flow of the refrigerant. In the cooling operation, a high-temperature, high-pressure liquid refrigerant from the compressor (in the outdoor unit) may be supplied to the indoor unit via the outdoor heat exchanger (in the outdoor unit). In the indoor heat exchanger (in the indoor unit), the refrigerant is expanded and evaporated. As a result, temperature of the surrounding air is lowered. As an indoor unit fan is rotated, cool air is discharged into the room. On the other hand, in the heating mode, a high-temperature, high-pressure gas refrigerant from the compressor (in the outdoor unit) is supplied to the indoor unit. In the indoor heat exchanger (in the indoor unit), the high-temperature, high-pressure gas refrigerant is liquefied and discharged. As a result, temperature of the surrounding air is raised. As an indoor unit fan is rotated, hot air is discharged into the room.

The air conditioner with the above-described configuration may not operate any longer if the compressor or a fan motor is abnormal.

Insulation resistance of the compressor or the fan motor may be measured in order to determine whether the compressor of the air conditioner is abnormal. However, this measurement may be possible only after the compressor or the fan motor of the air conditioner has broken down. However, it may not be possible to monitor the lifespan of the compressor or the fan motor or progress of the breakdown of the compressor or the fan motor before the compressor or the fan motor of the air conditioner has broken down.

Additionally, since the insulation resistance of the compressor or the fan motor is measured, it is possible to sense only abnormality generated in windings of the compressor or the fan motor; however, it may not be possible to sense breakdowns generated due to other causes.

That is, in a situation in which the compressor is abnormal, the air conditioner may not perform cooling and heating operations. Accordingly, there is a high necessity for a method of monitoring sensing abnormality of the compressor and coping with the sensed abnormality of the compressor.

BRIEF DESCRIPTION OF THE DRAWINGS

Arrangements and/or embodiments may be described in detail with reference to the following drawings in which like reference numerals refer to like elements and wherein:

FIG. 1 is a view schematically showing an air conditioner according to an example embodiment;

FIG. 2 is a view schematically showing an outdoor unit and an indoor unit according to an example embodiment;

FIG. 3 is a block diagram showing a control construction for sensing abnormality of a compressor or a fan motor of an air conditioner according to an example embodiment;

FIG. 4 is a view schematically showing a sensing unit for sensing abnormality of the compressor or the fan motor according to an example embodiment;

FIG. 5 is a view showing an installation example of a sensing unit of an air conditioner according to an example embodiment; and

FIG. 6 is a view showing an example of a warning output from an air conditioner according to an example embodiment.

DETAILED DESCRIPTION

Advantages and features of embodiments and the way of achieving them may become apparent with reference to embodiments described below in conjunction with the accompanying drawings. However, embodiments are not limited to embodiments disclosed in the following description but may be embodied in various different forms. The embodiments, which may be described below, may be provided to complete the disclosure and to correctly inform those skilled in the art. Embodiments may be defined only by the scope of the accompanying claims. Throughout the specification, the same components are denoted by the same reference numerals.

Embodiments may be described in detail with reference to the accompanying drawings.

FIG. 1 is a view schematically showing an air conditioner according to an example embodiment. FIG. 2 is a view schematically showing an outdoor unit and an indoor unit according to an example embodiment. Other embodiments and configurations may also be provided.

As shown in FIGS. 1 and 2, an air conditioner may include at least one indoor unit 20 (21 to 24) and at least one outdoor unit 10 (11 and 12). Additionally, the air conditioner may include at least one remote controller 30 (31 and 32) connected to the indoor unit 20 for allowing a user to input a command to the indoor unit 20. The air conditioner may further include a remote control unit 40 connected to the indoor unit 20 and the outdoor unit 10 for monitoring and controlling operations of the indoor unit 20 and the outdoor unit 10.

Based on the installation type thereof, the air conditioner may be classified as a ceiling mounted type air conditioner, a floor stand type air conditioner, and/or a wall mounted type air conditioner. In addition to the outdoor unit and the indoor unit, the air conditioner may further include a ventilation unit, an air cleaning unit, a humidification unit, a dehumidification unit, and/or a heating unit.

The indoor unit 20 may include a discharge port, through which heat-exchanged air is discharged. The discharge port is provided an air direction control unit for opening and closing the discharge port and for controlling a direction of air discharged through the discharge port. The indoor unit 20 may control a rotational speed of an indoor unit fan to control air that is suctioned and air that is discharged and to adjust a flow rate of air. The indoor unit 20 may further include an output unit for displaying an operation state and setting information of the indoor unit 20, and an input unit for allowing a user to input setting data.

The outdoor unit 10 may operate in a cooling mode or a heating mode according to demand of the indoor unit 20, which is connected to the outdoor unit 10, or a control command from the remote control unit 40. Additionally, the outdoor unit 10 may supply a refrigerant to the indoor unit 20.

The outdoor unit 10 may include at least one compressor 2 for compressing a refrigerant introduced into the compressor 2 to discharge a high-pressure gas refrigerant, an accumulator 3 for separating a gas refrigerant and a fluid refrigerant from each other to prevent the fluid refrigerant from being introduced into the compressor 2 in a state in which the fluid refrigerant is not evaporated, an oil separator (not shown) for collecting oil from the refrigerant discharged from the compressor, an outdoor heat exchanger 4 for exchanging heat with outdoor air to condense or evaporate the refrigerant, an outdoor unit fan 5 for introducing air into the outdoor heat exchanger 4 to more smoothly perform heat exchange between the outdoor heat exchanger 4 and the air and discharging the heat-exchanged air outdoors, a four-way valve 7 for changing the flow channel of the refrigerant based on the operation mode of the outdoor unit 10, an outdoor electronic expansion valve 6 configured to be controlled based on sub-cooling and super-heating in a heating operation, at least one pressure sensor (not shown) for measuring pressure, at least one temperature sensor (not shown) for measuring temperature, and a control device (not shown) for controlling the operation of the outdoor unit and communicating with other units.

In a cooling operation (of the air conditioner), the outdoor heat exchanger 4 acts as a condenser for suctioning a gas refrigerant and condensing the suctioned gas refrigerant using outdoor air. On the other hand, in a heating operation (of the air conditioner), the outdoor heat exchanger 4 may act as an evaporator for suctioning a liquid refrigerant and evaporating the suctioned liquid refrigerant using outdoor air.

The outdoor unit fan 5 may include an outdoor unit fan motor 5 b for generating driving force under control of the control device (not shown) of the outdoor unit 10, and an outdoor fan 5 a rotated by the driving force from the outdoor unit fan motor 5 b to generate blowing force.

In the cooling operation (of the air conditioner), an indoor heat exchanger 8 acts as an evaporator for suctioning a liquid refrigerant and evaporating the suctioned liquid refrigerant using air in the room in which the indoor unit 20 that has requested the cooling operation is installed, to cool the indoor air. On the other hand, in the heating operation (of the air conditioner), the indoor heat exchanger 8 acts as a condenser for suctioning a gas refrigerant and condensing the suctioned gas refrigerant using air in the room in which the indoor unit 20 that has requested the heating operation is installed, to increase the temperature of the indoor air.

An indoor unit fan 9 may include an indoor unit fan motor 9 b for generating driving force under the control of a control device (not shown) of the indoor unit 20, and an indoor fan 9 a connected to the indoor unit fan motor 9 b such that the indoor fan 9 a is rotated by the driving force from the indoor unit fan motor 9 b to generate blowing force.

The air conditioner may act as a cooler for cooling the room. Alternatively, the air conditioner may act as a heat pump for cooling or heating the room.

The remote control unit 40 may receive data from the indoor unit 20 to display an operation state of the indoor unit, and the remote control unit 40 may transmit input data to the indoor unit 20 to control the indoor unit 20 to operate according to a predetermined setting. Additionally, in a situation in which the indoor unit 20 or the outdoor unit 10 is abnormal, the remote control unit 40 may display, on a screen, an warning corresponding thereto.

The remote controller 30 may connect to the indoor unit 20 in a wired or wireless fashion to transmit operation setting data to the indoor unit 20. The remote controller 30 may allow operation schedules of the indoor unit 20 as well as operation settings (such as modes, temperature, and a flow rate of air) of the indoor unit 20 to be inputted, and the remote controller 30 may transmit the input data to the indoor unit 20 such that the indoor unit 20 can be operated based on the input data. Additionally, the remote controller 30 may receive state information from the indoor unit 20, and may display the received state information of the indoor unit 20.

FIG. 3 is a block diagram showing a control construction for sensing abnormality of a compressor or a fan motor of the air conditioner according an example embodiment. Other embodiments and configurations may also be provided.

Referring to FIG. 3, the outdoor unit 10 may include a power supply unit 140 for supplying electric power, an outdoor unit fan 180, a fan driving unit 170, a compressor 160, a compressor driving unit 150, a data unit 120, and a control unit 110 (or controller) for controlling overall operation of the outdoor unit 10.

Additionally, the outdoor unit 10 may further include a communication unit for communicating with the indoor unit 20 and the remote control unit 40. The communication between the outdoor unit 10 and the indoor unit 20 and the communication between the remote control unit 40 and the outdoor unit 10 may be performed using a same communication method or different communication methods in order to transmit data.

The outdoor unit 10 may further include an output unit (such as a display) for displaying information about an operation state of the outdoor unit 10. The control unit 110 of the outdoor unit 10 may transmit data to the indoor unit 20 or the remote control unit 40 such that the data from the outdoor unit 10 can be displayed on a display unit (or display) provided in the indoor unit or a display unit (or display) provided in the remote control unit 40.

The power supply unit 140 may supply electric power necessary to operate the air conditioner from the outside of the air conditioner. The power supply unit 140 may rectify and smooth the electric power input to the power supply unit 140, and supply the rectified and smoothened electric power to the respective units. Additionally, the power supply unit 140 may include an overcurrent prevention unit for preventing damage to the air conditioner due to the input electric power.

Upon receiving operation current supplied from the compressor driving unit 150, the compressor 160 may compress a refrigerant to discharge a high-temperature, high-pressure gas refrigerant.

The compressor driving unit 150 may control the operation of the compressor 160 according to a control command from the control unit 110. In a situation in which the compressor 160 is an inverter type compressor, the compressor driving unit 150 may control an operation frequency of the compressor 160.

In a situation in which heat exchange between the outdoor heat exchange and the refrigerant is performed, the outdoor unit fan 180 may discharge heat-exchange air from the air conditioner.

The fan driving unit 170 may control operation of the outdoor unit fan 180, and apply operation power to the outdoor unit fan 180, according to the control command from the control unit 110.

The fan driving unit 170 and the compressor driving unit 150 may each include an inverter.

A sensing unit 130 (or sensor) may be installed inside or outside the outdoor unit 10 to sense and measure data about the outdoor unit 10 and data about the state of the outdoor unit 10 during operation of the outdoor unit 10 and to transmit the sensed and measured data to the control unit 110.

The sensing unit 130 may include a plurality of sensors. For example, the sensing unit 130 may include sensors installed inside and outside the outdoor unit 10 for measuring temperature, pressure, humidity, carbon dioxide, flow rate of air, voltage, current and/or etc.

The control unit 110 may control the compressor driving unit 150 and the fan driving unit 170 based on the data received from the indoor unit 20 or the remote control unit 40 such that the compressor 160 and the outdoor unit fan 180 can be operated.

The control unit 110 may generate a control command to vary operations of the compressor 160 and the outdoor unit fan 180 based on the data input from the sensing unit 130, and apply the generated control command to the compressor driving unit 150 and the fan driving unit 170.

The control unit 110 (or controller) may determine whether the compressor 160 and the outdoor unit fan 180 are abnormal based on the data received from the sensing unit 130, and may control a warning corresponding thereto to be output.

More particularly, in a situation in which the compressor 160 and the outdoor unit fan 180 are abnormal, with a result that the compressor 160 and the outdoor unit fan 180 cannot operate any longer, the control unit 110 may control operation of the air conditioner to be stopped, and control a warning corresponding thereto to be output.

On the other hand, in a situation in which it is determined (based on the data received from the sensing unit 130) that the compressor 160 and the outdoor unit fan 180 are abnormal; however, the compressor 160 and the outdoor unit fan 180 can be operated, the control unit 110 controls operation of the air conditioner to be continuously performed, and controls a warning corresponding thereto to be output.

As previously described, the compressor 160 or the outdoor unit fan 180 may be provided with a motor, by driving of which the compressor 160 or the outdoor unit fan 180 is operated. In the following description, motors are provided in the compressor, the outdoor unit fan, and the indoor unit fan.

The above description was based on the outdoor unit 10. However, the same description may equally apply to the indoor unit 20. In a situation in which the indoor unit fan is abnormal, abnormality of the indoor unit fan may be sensed, and a warning corresponding thereto may be output.

As shown in FIG. 4, a motor 50 may operate by a driving control unit 60 for controlling the driving of the motor 50.

As shown in FIG. 4, the driving control unit 60 may include a motor control unit 61 for generating a control signal to drive the motor 50, and a motor driving unit 62 for applying operation current to the motor 50 according to the control signal.

Construction of the driving control unit 60 may equally apply to the compressor driving unit 150 and the fan driving unit 170.

The sensing unit 130 may include a first sensor 131 for sensing operation current applied from the motor driving unit 62 to the motor 50 and a signal processing unit 139 for analyzing data received from the sensor to sense abnormality.

The sensing unit 130 may further includes a second sensor for sensing the motor driving unit 62.

The signal processing unit 139 may determine a state and abnormality of the motor 50 based on data sensed by the first sensor 131. Additionally, the signal processing unit 139 may determine progress of a breakdown and a breakdown portion of the motor 50 based on a sensed current waveform.

Since breakdown of the motor 50 does not occur at one time but occurs as a result of accumulation of problems, the sensing unit 130 senses the state of the motor 50 at the breakdown progress step in order to sense abnormality that may subsequently occur.

For example, when a bearing of the motor is excessively worn, gap eccentricity may be caused, with a result that a magnetomotive force waveform of the motor may change.

In a situation in which the current waveform received from the first sensor 131 changes, the signal processing unit 139 may determine a state of the motor based thereon.

Additionally, in a situation in which a stator of the motor is abnormal, mechanical vibration may be generated from the motor, with a result that a specific current frequency of the stator is generated. When the operation current is sensed by the first sensor 131, the current frequency generated from the motor may also be sensed.

In a situation in which such a current frequency is included in the operation current sensed by the first sensor 131, the signal processing unit 139 may determine that the stator is abnormal, and may transmit data about a breakdown position to the control unit 110.

In a situation in which the current waveform of the operation current sensed by the first sensor 131 has changed, the signal processing unit 139 may determine that the bearing is abnormal, and may transmit data about the breakdown position to the control unit 110.

The sensing unit 130 may further include an additional communication module and a memory.

The signal processing unit 139 may transmit data to the control unit 110 through the communication module in a wireless communication fashion. Alternatively, the signal processing unit 130 may be connected to the outdoor unit or the indoor unit via a communication cable to transmit data to the control unit 110.

The control unit 110 (or controller) may operate based on data received from the sensing unit 130. In a situation in which the motor is abnormal with the result that the motor cannot operate, the control unit controls the motor to not operate. On the other hand, in a situation in which the motor is abnormal but the motor can operate, the control unit controls a warning corresponding thereto to be output. In a situation in which no display unit is provided at the outdoor unit, the control unit 110 may transmit the data to the remote control unit or the indoor unit such that the warning can be displayed on the remote control unit side or the indoor unit side. Additionally, in a situation in which the indoor unit is a ceiling mounted type indoor unit, the indoor unit may transmit the data to the remote control unit or the remote controller such that the warning can be displayed on the remote control unit side or the remote controller side.

FIG. 5 is a view showing an installation example of a sensing unit of an air conditioner according to an example embodiment. Other embodiments and configurations may also be provided.

As shown in FIG. 5, the sensing unit 130 may be installed on a power cable that is connected to the compressor, the indoor unit, or the indoor unit fan.

The sensing unit 130 may be detachably attached to the power cable. The sensing unit 130 may be configured to surround the power cable.

For example, the sensing unit 130 may be configured to have a clip shape such that the sensing unit 130 can be mounted on the power cable, which is connected to the motor.

Alternatively, the sensing unit 130 may be mounted on the power cable in a state in which the sensing unit 130 is not directly connected to the power cable. That is, the sensing unit 130 may be disposed at the power cable in a state in which the sensing unit 130 is spaced apart from the power cable by a predetermined distance.

The first sensor 131 may be mounted on one of the three-phase power lines connected from the motor driving unit 62 to the motor 50 to sense operation current flowing along the power cable in a non-contact fashion. The first sensor 131 may sense current using an induced current.

The signal processing unit 139 may analyze the sensed current, and transmit data about the state of the motor to the control unit 110 (or controller).

The control unit 110 may determine whether to continuously operate the motor based on the data received from the signal processing unit 139, and control a warning corresponding thereto to be output.

Upon determining (based on the received data) that the motor has broken down, and the predetermined operation of the motor cannot be performed, the control unit 110 may control operation of the motor to stop, and control an error related thereto to be output.

Upon determining, based on the received data, that the motor is abnormal but the motor can operate, the controller 110 controls operation of the air conditioner to be continuously performed, and controls an warning corresponding thereto to be output such that the user can check the state of the motor.

Based on the state of the motor (e.g. whether the motor has broken down or the motor is abnormal but has not yet broken down), the controller 110 controls different warnings to be output such that the user can check the state of the motor.

FIG. 6 is a view showing an example of a warning output from an air conditioner according to an example embodiment. Other embodiments and configurations may also be provided.

As shown in FIG. 6, an warning about abnormality of the compressor or the outdoor unit fan (of the outdoor unit) or the indoor unit fan (of the indoor unit) may be output through the remote control unit 40. As previously described, the warning may also be output through the display unit (or display) of the indoor unit or the remote controller.

In a situation in which one selected from among the compressor 160 (or 2), the outdoor unit fan 180 (or 5), and the indoor unit fan 9 is abnormal, the sensing unit 130 may sense the abnormality and transmit data about the abnormality to the control unit 110. The control unit 110 may control operation of the air conditioner based on the data about the abnormality, and control a warning corresponding thereto to be output.

As shown in FIG. 6(a), a warning message 51 may be displayed on a display unit (or display) in the form of a popup window.

Upon determining that the operation of the air conditioner cannot be continuously performed any longer based on data about the abnormality sensed by the sensing unit 130, the controller 110 may control the operation of the air conditioner to be stopped, and control an output of a warning message about the breakdown and the stop of the air conditioner.

A help button for displaying an additional description of the breakdown and a help message may be further displayed on the screen.

As shown in FIG. 6(b), abnormality of one selected from among the units (i.e., the outdoor unit and the indoor unit) may be displayed on the remote control unit 40 such that an icon 52 of the corresponding unit is distinguished from icons of other units, and a warning message 53 corresponding thereto is also displayed on the remote control unit 40.

As shown in FIG. 6(c), an abnormal unit 54 may be displayed such that the abnormal unit 54 is distinguished from the other units. In a situation in which the abnormality is not related to operation of the air conditioner or in a situation in which the abnormality is not serious to such an extent that it is necessary to stop operation of the air conditioner, however, the operation of the air conditioner may be continuously performed. As a result, operation information 56 may then be displayed on the screen, and a warning message 55 about the generated abnormality may be displayed on a portion of the screen.

In the air conditioner, a breakdown that has occurred may be sensed and the breakdown position may be specified, and progress of a breakdown that will occur in advance may be sensed and preparations may be made for the breakdown of the air conditioner.

Although all components constituting an embodiment have been described to be combined into a single unit and be operated as the single unit, embodiments are not limited to such an embodiment. Depending upon embodiments, all the components may be selectively combined into one or more units and operated as one or more units within the scope of the object of the present invention.

As is apparent from the above description, in the air conditioner, the state of the motor may be sensed using a non-contact type sensor, whereby it is possible to easily monitor states of the compressor and the fan, to sense progress of the abnormality of the compressor and the fan or whether the compressor and the fan have broken down, and to estimate the expected lifespan of the compressor or the fan based on the state thereof using the monitored results. Damage to the air conditioner may be prevented due to abnormality of the compressor or the fan motor.

It is an object to provide an air conditioner that is capable of monitoring an operation state of a compressor in the air conditioner and diagnosing the progress of a breakdown of a compressor and a fan or a breakdown portion.

Objects can be accomplished by the provision of an air conditioner including a display unit (or display) for displaying the operation state of the air conditioner, a motor configured to rotate to generate a driving force, a driving control unit for controlling driving of the motor, a sensing unit for sensing abnormality of the motor, and a control unit for controlling operation of the air conditioner based on data received from the sensing unit, wherein the sensing unit is mounted on a power cable, in which operation current supplied from the driving control unit to the motor flows, for sensing the operation current to sense a breakdown and an operation state of the motor, and the display unit outputs the operation state of the motor in response to a control command from the control unit and outputs a warning message about the abnormality generated in the motor.

Any reference in this specification to “one embodiment,” “an embodiment,” “example embodiment,” etc., means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment of the invention. The appearances of such phrases in various places in the specification are not necessarily all referring to the same embodiment. Further, when a particular feature, structure, or characteristic is described in connection with any embodiment, it is submitted that it is within the purview of one skilled in the art to affect such feature, structure, or characteristic in connection with other ones of the embodiments.

Although embodiments have been described with reference to a number of illustrative embodiments thereof, it should be understood that numerous other modifications and embodiments can be devised by those skilled in the art that will fall within the spirit and scope of the principles of this disclosure. More particularly, various variations and modifications are possible in the component parts and/or arrangements of the subject combination arrangement within the scope of the disclosure, the drawings and the appended claims. In addition to variations and modifications in the component parts and/or arrangements, alternative uses will also be apparent to those skilled in the art. 

What is claimed is:
 1. An air conditioner comprising: a display to display an operation state of the air conditioner; a motor configured to be rotated to generate driving force; a driving controller to control driving of the motor; a sensing unit to sense an abnormality of the motor; and a controller to control operation of the air conditioner based on data received from the sensing unit, wherein the sensing unit is provided on a power cable, wherein operation current from the driving controller flows to the motor via the power cable, the sensing unit for sensing the operation current to sense a breakdown and an operation state of the motor, and in response to a control command from the controller, the display outputs the operation state of the motor and outputs a warning message regarding the abnormality of the motor.
 2. The air conditioner according to claim 1, wherein the motor is provided at one of an outdoor unit fan, an indoor unit fan, and a compressor of the air conditioner.
 3. The air conditioner according to claim 1, wherein the sensing unit is detachably attached to one of three-phase power lines coupled to the motor.
 4. The air conditioner according to claim 1, wherein the sensing unit is to surround the power cable. The air conditioner according to claim 1, wherein the sensing unit is spaced apart from the power cable by a predetermined distance to sense the operation current flowing in the power cable using an induced current, and the sensing unit is not electrically connected to the power cable.
 6. The air conditioner according to claim 5, wherein the sensing unit has a clip shape such that the sensing unit is provided on the power cable.
 7. The air conditioner according to claim 1, wherein the sensing unit includes: a sensor to sense the operation current in the power cable; and a signal processing unit to determine the operation state or the abnormality of the motor based on the sensed operation current.
 8. The air conditioner according to claim 7, wherein when a current waveform of the sensed operation current changes, the signal processing unit transmits data to the controller.
 9. The air conditioner according to claim 8, wherein when the current waveform of the sensed operation current changes, the signal processing unit determines that a bearing is worn and transmits, to the controller, data regarding a breakdown.
 10. The air conditioner according to claim 7, wherein when a specific current frequency is contained in the sensed operation current, the signal processing unit transmits, to the controller, data thereabout.
 11. The air conditioner according to claim 10, wherein when the specific current frequency is contained in the sensed operation current, the signal processing unit determines that a stator at the motor is abnormal and transmits, to the controller, data regarding a breakdown.
 12. The air conditioner according to claim 10, wherein in response to determining, based on the data received from the signal processing unit, that the motor has broken, the controller controls the operation of the air conditioner to stop and controls the display to display a warning.
 13. The air conditioner according to claim 10, wherein in response to determining, based on the data received from the signal processing unit, that an abnormal current or an abnormal frequency is provided in the operation state of the motor, the controller controls the operation of the air conditioner to be continuously performed and controls the display to display a warning related to the abnormality of the motor.
 14. The air conditioner according to claim 10, wherein in response to determining that the data from the signal processing unit are data generated due to the abnormality of the motor, the controller controls the data to be transmitted to another unit such that a warning is output at the another unit.
 15. The air conditioner according to claim 1, wherein when the motor is abnormal, the display differently displays a warning message regarding a breakdown that has occurred and a warning message regarding the abnormality of the motor in response to the control command from the controller.
 16. An air conditioner comprising: a display; a motor to provide a driving force; a driving controller to control driving of the motor; a sensing device to sense an abnormality of the motor; and a controller to control operation of the air conditioner based on information received from the sensing device, wherein the sensing device to sense an operation current on a cable from the driving controller to the motor, the sensing device to sense a breakdown or an operation state of the motor, and in response to a control command from the controller, the display to display the operation state of the motor or a warning message regarding the abnormality of the motor.
 17. The air conditioner according to claim 16, wherein the sensing device is provided on the power cable.
 18. The air conditioner according to claim 16, wherein the sensing device is detachably coupled to one of three-phase power lines coupled to the motor.
 19. The air conditioner according to claim 16, wherein the sensing device includes: a sensor to sense the operation current flowing in the cable; and a signal processing unit to determine the operation state or the abnormality of the motor based on the sensed operation current.
 20. The air conditioner according to claim 19, wherein when a current waveform of the sensed operation current changes, the signal processing unit transmits data to the controller. 